Do a search in Braking and suspension thread as it has been discussed before. But with brakes more is often not better, and bigger is not always better. When looking at brakes the two things you have to remember are P=F/A or Pressure = Force / Area and F=uN or Friction = Friction coefficient x Normal Force
So Assuming you apply the same brake pressure force to your brake pedal....the bigger the BMC the larger the denominator. The larger the denominator the lower the Pressure. That pressure is effectively (N) which correlates to the second equation F=uN so the lower the pressure the lower the force on the back of the brake pad (N) which means you have lower friction levels. This means you require more pedal effort. This is important to understand as big calipers with big pistons give you more braking force and you need to lower the pressure applied to them otherwise you end up with a light switch as a brake pedal and that means frequent brake lock ups and poor modulation.
So its all about balance...and running a setup with more thermal dissipation with regards to bigger pads and rotors and then size caliper pistons and BMC to ensure you still have good feel and modulation. (ie, bigger rotors increase braking torque as well as heat dissipation...so all things being equal if you go up in rotor size then to maintain balance you can go down in caliper piston size so as not to mess with braking bias)
LOL, this is a for sale thread. Do a search and do your homework to make sure you understand what you are buying...if you buy big brakes thinking you will stop quicker you are mistaken...if you want to stop quicker go buy better tyres and suspension to stop quicker...big brakes to stop as well the 10th time as you did the 1st time (consistency)